Western Brackenfern

Pteridium esculentum (G. Forst.) Nakai

Tony Rodd cc-by-nc-sa

Pteridium esculentum (Western Brackenfern) is a species of perennial herb in the family Dennstaedtiaceae. They are native to The Contiguous United States. They have bipinnate + pinnatifid leaves. They have alternation of generations.

URI: http://purl.obolibrary.org/obo/FLOPO_0980073
Definition: Of plant duration, a plant whose life span extends over more than two growing seasons, c.f. annual, biennial, ephemeral, of flowering with respect to architecture, hapaxanthic, monocarpic, pleonanthic
Attribution: Stevens, P. F. (2001 onwards). Angiosperm Phylogeny Website. Version 12, July 2012. Glossary: http://www.mobot.org/mobot/research/apweb/top/glossaryi_p.html#perennial

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URI: http://purl.obolibrary.org/obo/FLOPO_0022142
Definition: whole plant herbaceous

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URI: http://www.wikidata.org/entity/Q578170

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URI: http://eol.org/schema/terms/bipinnatepinnatifid
Definition: a bipinnately compound leaf, with the pinnae being pinnatifid.
Attribution: https://en.wikipedia.org/wiki/Pinnation

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URI: http://eol.org/schema/terms/alternatingReproduction
Definition: Organisms with a life cycle that features alternation of generations with sexual and asexual reproduction.

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EOL has data for 9 attributes, including:

geographic distribution includes
- URI: http://eol.org/schema/terms/Present
- Definition: This organism is known to be present in this location or region. Not exclusive; other regions may also be reported.
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Louisiana
habitat
- URI: http://purl.obolibrary.org/obo/RO_0002303
- Definition: x has habitat y if: x is an organism, y is a habitat, and y can sustain and allow the growth of a population of x
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terrestrial
- URI: http://purl.obolibrary.org/obo/ENVO_00000446
- Definition: A biome that applies to the terrestrial realm.
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Leaf Complexity
- URI: http://purl.obolibrary.org/obo/FLOPO_0007484
- Definition: whether a leaf is intricate or compounded
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bipinnate + pinnatifid
- URI: http://eol.org/schema/terms/bipinnatepinnatifid
- Definition: a bipinnately compound leaf, with the pinnae being pinnatifid.
- Attribution: https://en.wikipedia.org/wiki/Pinnation
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leaf venation structure
- URI: http://purl.obolibrary.org/obo/FLOPO_0008074
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parallel/free (leaf veins)
- URI: http://eol.org/schema/terms/freevein
- Definition: veins run parallel and equidistant to each other for most of the length of the leaf; they may converge or fuse (anastomose) towards the apex
- Attribution: https://en.wikipedia.org/wiki/Leaf#Veins
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life cycle habit
- URI: http://purl.obolibrary.org/obo/TO_0002725
- Definition: Determined for type of life cycle being annual, biennial, perennial etc.
- Comment: The life cycle habit indicates the typical duration of an individual plant's life. Common values are annual, biennial, and perennial. Some plants have different durations depending on environment or location, so a plant can have more than one value.
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perennial
- URI: http://purl.obolibrary.org/obo/FLOPO_0980073
- Definition: Of plant duration, a plant whose life span extends over more than two growing seasons, c.f. annual, biennial, ephemeral, of flowering with respect to architecture, hapaxanthic, monocarpic, pleonanthic
- Attribution: Stevens, P. F. (2001 onwards). Angiosperm Phylogeny Website. Version 12, July 2012. Glossary: http://www.mobot.org/mobot/research/apweb/top/glossaryi_p.html#perennial
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native range includes
- URI: http://eol.org/schema/terms/NativeRange
- Definition: Lists jurisdictions in which a given organism is a member of the undisturbed fauna or flora.
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The Contiguous United States
- URI: http://www.wikidata.org/entity/Q578170
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plant growth form
- URI: http://purl.obolibrary.org/obo/FLOPO_0900032
- Definition: whole plant growth form. eg: herbaceous, tree, liana
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herb
- URI: http://purl.obolibrary.org/obo/FLOPO_0022142
- Definition: whole plant herbaceous
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reproduction
- URI: http://purl.obolibrary.org/obo/GO_0000003
- Definition: The production of new individuals that contain some portion of genetic material inherited from one or more parent organisms
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alternation of generations
- URI: http://eol.org/schema/terms/alternatingReproduction
- Definition: Organisms with a life cycle that features alternation of generations with sexual and asexual reproduction.
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spore arrangement
- URI: http://eol.org/schema/terms/sporeArrangement
- Definition: The important feature of homospory is the four fold division involved in spore production, this takes the form of either a tetrahedra which gives a trilete (Y shaped scar) spore or a tetragon which gives a monolete (single linear scar) spore.
- Attribution: https://www.ucl.ac.uk/GeolSci/micropal/spore.html
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trilete
- URI: http://eol.org/schema/terms/trilete
- Definition: spores bearing a Y shaped scar, indicating that they were arranged in a tetrahedral spore tetrad
- Attribution: https://www.ucl.ac.uk/GeolSci/micropal/spore.html
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Known occurrences, collected specimens and observations of western brackenfern. View this species on GBIF

Tony Rodd cc-by-nc-sa